瞬变电磁法对工作面底板注浆工程的稳定性评判

Judgment of transient electromagnetic techniques testing grouting effect of lower confining bed

为探查煤层底板含水层注浆加固后的情况,预防煤层底板突水事件的发生,基于矿井瞬变电磁法的地球物理学特征,根据巷道的探查环境,选择矿井瞬变电磁法对煤层底板进行探测,介绍了井下视电阻率的计算公式和工作装置,给出了探测图形显示结果。结合后期的钻孔资料表明,探查结果与实际钻孔情况基本吻合。

To check the results of grouting reconstruction of coal floor, and to prevent the happening of the water-inrush condition, based on the earth physics features of mine transient electromagnetic method and the environment of exploration, the coal floor are detected by using mine transient electromagnetic method, the underground apparent resistivity calculation formula and work device are introduced, the detection graphic results are shown. Combined with the late borehole data, it shows the exploration results are basically consistent with the actual drilling results.